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FTP Library Overview

Introduction

The SmartFTP FTP Library ActiveX component (COM) provides file transfer functionality using the FTP and SFTP protocol. It offers a wide range of features, reliable and secure file transfers (SSH and SSL/TLS). The component takes advantage of the COM technology which makes it possible to use it in numerous environments such as Visual Basic, Visual C++, JavaScript/VBScript, VB.NET, C#.NET, Delphi, etc.

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General Features

  • Upload, Download with Resume capability
  • Rename, Make and Remove Directory
  • Move/Rename and Delete File
  • IPv4 and IPv6
  • International Domain Names (IDN)
  • Enhanced NAT/UPnP/ICS/ICF Support
  • UTF8 / Unicode Support
  • SOCKS4, SOCKS4A, SOCKS5, HTTP Proxy Support
  • Support for 64-bit file size (> 4GB)
  • Transfer Speed Limits (Global and per connection)
  • File Logging
  • Multi Language Support
  • Synchronous (Blocking) and Asynchronous (Non-blocking) calls.
  • Native Windows x64 (64-bit) support
  • Verified for Windows Vista
  • Complete HTML Help Documentation HTML Help Documentation

FTP Protocol Features

  • Server to Server (FXP) Transfers
  • Secure Transfers (SSL/TLS)
  • Compression (MODE Z)
  • Transfer Integrity (XCRC, XMD5, XSHA1)
  • Machine Readable Listing (MLSD)
  • FTP Parser (Unix, MLST, VMS, MVS, DOS, HP-UX, zOS)
  • Enhanced NAT/UPnP/ICS/ICF Support
  • FTP Proxy Support (Wingate, Checkpoint FW-1, Transparent, etc)
  • Set/Get Modified File Time (MDTM, MFMT, SITE UTIME)
  • IP Repeater
  • Local Port Limitation
  • Set Unix Attributes (SITE CHMOD Wrapper)

SFTP Protocol Features New

  • SFTP Protocol Version: 3-6
  • Host Key Algorithms: RSA (any size) and DSA (any size)
  • Encryption Algorithms: aes256-cbc, aes192-cbc, aes128-cbc, 3des-cbc, blowfish-cbc, arcfour, cast128
  • Key Exchange: DH group 1, DH group 14, DH group exchange, DH group exchange SHA256
  • Authentications: password, publickey, keyboard-interactive, SecurID, hostbased, none
  • Compression: zlib, none
  • HMAC Algorithms: hmac-sha1, hmac-md5, hmac-sha1-96, hmac-md5-96, hmac-ripemd160
  • Performance: Optimized assembler for performance critical algorithms.
  • Interoperability: Tested against all public available SFTP/SSH server implementations. Automatically uses workarounds for faulty implementations.

Sample Applications

Additional sample applications are included in the installation package.

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